Here is the full list of all 22 Doodle God achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Episode Four passed
All episodes passed without hints
Episode Three passed
All Bad things created
Alle drankjes aangemaakt
Episode One passed
Episode Two passed
Games created
Episode One passed without hints
Similar elements reacted
6 elements created
10 groups created
Life created
Human created
Element created 3 or more times
Save the Princess quest passed
Run, Santa, run quest completed
Sins vs. Virtues quest completed
Greatest Inventions quest completed
Survivor quest completed
All reactions revealed
All reactions with Philosophers' stone discovered